Centrifugal diffusing apparatus for spreading products for the maintenance of roadways



A. J. 'SCHARS March 25, 1930. 1,751,533

' CENTRIFUGAL DIFFUSi-I-NG APPARATUS FOR SPREADING PRODUCTS FOR THE MAINTENANCE OF ROADWAYS '4 Sheets-Sheet 1 Filed Jan. 10, 1928 v S M W March 25, 1930. J. SCHARS CENTRIFUGAL DIFFUSING APPARATUS FOR SPREADING PRODUCTS FOR THE MAINTENANCE OF ROAD Flled Jan 10, 1928 4 Sheets-Sheet, 2

s 0 W I March 25, 1930. A, CHA 1,751,531

FUSING APPARATUS FOR SPRE NG GENTRIFU DIF PRODU FOR THE MAINTENANCE OF ROADW Filed Jan. 10, 1928 4 Sheets-Sheet 5 ,w im gdsMam 1&5,

March 25, 1930. A. J. SCHARS 1,751,531

CENTRIFUGAL DIFFUSING APPARATUS FOR SPREADING PRODUCTS FOR THE MAINTENANCE OF ROADWAYS Filed Jan. 10, 1928 4 Sheets-Sheet 4 Patented Mar. 25, 1930 uialt li-l ls r 'ras PATENT" ounce] ALPHQNSE JOSEPH SCKARS, OI BOBDEAUZ, FRANCE cnm'muean nmrusme A'rrana'rus roa srnmnms rnonuc'rs For. 'rnn mim'rm' NANCE or ROADWAYS Application filed January 10, 1928, Serial No. 245,751, and in France January 28,1837.

Thepresent invention relates to a centrifugal diffusing apparatus for; s preading,. in

the hot or cold state, products for the main-- the material to be spread and receiving ts movement from any suitable driving mechanism, is characterized by the arrangement,'on an axis capable of receiving a continuous r01 tary movement, of walls providing between them zones fed with material to be spread and from which centrifugal force enters in action for projecting the said material by. dispersing it according'to a conical zone the theoretical axis of which mingleswith the axis of rotation of the walls.-

The arrangement. of the rotating wallsis variable with the nature of the product to be spread, its degree of fluidity, or its homogeneity.

The. accompanying drawing illustrates, by way of example only, various forms of con; struction of the diffusing apparatus forming the subject-matter of the invention, 'as well as a form of construction of a mechanism for ac driving this diffusing apparatus. v

1 is an elevation of the rear part of a vehicle provided with the improved diffusing apparatus and its driving mechanism.

Fig. 2is a rear end View, and Fig. 3 a par-' tial plan view.

Fig. 4 is an axial sectional viewof a diffusing apparatus and of its frame.

Fig. 5 is an underside plan view of the diffusing apparatus of Fig. 4..

Fig. 6 1s a constructional modification of the diffusing apparatus, illustrated in axial section.

Figs. 7, 8 and 9 illustrate, inelevation, the three constituent elements of the difiusing apparatus of Fig. 6.

Figs. 10 and 11 respectively illustrate in axial section and underside plan view a third.

form of construction of the diffusing apparatus.

Figs. 12 and'13 are views similar to Figs.

'struction of the difiusing apparatus.

Figs. 14 and 15 are views similar to Figs. 10 and 11 illustrating another form of construction of the diffusing apparatus.

-As indicated in theforegoing, the arrangement of the rotating walls of the diffusing apparatus varies according to the material to 10. and Hand relate toa fourth form of conbe spread and the condition of fluidity or of homogeneity of the latter. A vehicle transporting the tank containing the material to be spread is providedwith a mechanism permanently mounted on a rotating axis to which can be rapidly secured the diffusing apparatus proper whic is specially suited to the material to be spread.

Fig. 4} shows a form of construction of the frame of the diffusing apparatus which has the aspect of" a casing 1 made of cast metal, for instance. This casing 1 is provided'with a bed plate 2 for securing itat any suitable place on the vehicle as will be explained later on. It is divided into two distinct chambers by a partition 3 on which is provided a bearing 4 for the axis 5 which receives the diffusing apparatus proper and imparts to the same its rotary movement. The upper chamber constitutes a transmission box, and, in the example illustrated, contains two bevel 'p'inions 6 and 7 respectively secured on the axis 5 and on a transverse shaft 8. The latter,

suitably supported in ball bearings 9 or other types of suitable bearings arranged in the fixed partition 10 and in a wall 11, receives its movement from any suitable source of power and transmits it to the axis 5.

The lower chamber is provided with a tube 12 connected by a flange 13 and any suitable junction means to a pipe for feeding under pressure, or simply by gravity, the material to be dispersed.

In Figs. 1 to 3, it will be seen that the casing 1 is secured by its bed plate 2 on a cross bar 14. arranged at the rear of the frame of the vehicle which carries the tank 15 containing the material to be spread. The vehicle can be of any desired arrangement and its construction does not concern the invention. It can be provided, if need be, with means for heating and stirring the material.

In the example illustrated, use is made of a single diffusing apparatus arranged in the axis of the vehicle. It is obvious and in partioular in the case oi large zones to be covered with. Pwte. t ns-,ma .eri ,that,,,sereral dis, fusing essiaen e em the same vehicle.

The rotation of the shaft can be effected by an independent niotorfnory iand asiillustrated, by the carrying wheels pf thevehiole.

' transverse shaft=16suitably snpportediinf fusing ap aratus. :Thehform: deconstruction bearings 17 secured on the frame 0'fthe'vehicle, carries atitsuends pinions l 8 ..c onnected by chains as ulleys 1e" in-eontactwith' the rimseoithewhee s -w hi h drive them when .'@The e ningsit rthe a, tee ef he ini eiiei canbe. arranged at the ends of forks v oted at 22 on theq ralneoi the; vehicle; and

whi ha ertbes used ite krbyx e n hmwthm g i yksu ableQfisnar t Em pera i g l veree mnsed w thin ea h v. a v he r ervof't v c eie h i e s Q$='P l fi pen el i l f *P ertrb t h v leys lt) can-alsobe brongh n contat the EWh w QnQ r wade-limes 11 Mum s rde e tvo effe t the ng n o euteisear stituted withont (departing from the scope o he ;=inv ti y e a ism c pa e of giving the, same, results. 1'; The axi'sjjof- 'the fnsing apparatus to rotate by 'rnalnl lally v t ge h br nk rel evingi p a lsf.

v The tnbe12 .fseonn-iete d by'apipe' ai "to a cook 25 arranged at the'lovver 'rea'rpa'rtf the tank-1 15, and'f operated from; a distanoe b'y means of a ,leverf26 ,vvithin -reach of the driver of the vehicle. f' V i diii'using apparatus illustratd in s ai and 5 s consti u d. a Series of co-axialvvallsll The central wa 1*27 icon stances, a, .s0c ket,';fori mounting the -whole strncturefo'rithefaxisfi; and it is seciired'by a key 28 or'nany e'quivalent Ineans; The other walls'are'conical surfaces with. generating lines pro ressively raised relatively; to" 1 the axis l he iwa l ifg -iidei w en them annular) spaces ,c-l Secl at their upper helical i clines;s'o's 'itably inclined relative 1y to the/direction of rotation; so as tO'a'cceL erate, the new vof the inateriahtowards the u' l l The materialflowing from theta'nk f1 5 'enters the space 31 and centrifugal forcednves a portion of the same into the annularspace 32, through openings 88 provided in the wall 34, then in the followingspace, and so on to the peripheral Wall. The vanes or blades .30 ep rse the mate i e.,..c aiee1/Sbfit WtifdS he gm d- 3T i wfi i l tdbefsp min-gs 6= ,T$,;af1d thei ifini fi" app r t pig ad'ap dtoy'spreadproducts go fthi'ck' cori-f i emprc se se st-c n 43.5; as rs/casters re ative ytoeclig '85 an l r? 'spa ces3 9- comprised between theav'a'l'ls of the bow provl e -with-'mdiar vaneser blades n alj e i ya -i;The l 3 a ;-au e. pe m i at 1, $9 i fi tc i i l 5T i 5f iI w ratns, Bat efjconrse; theidriving mech amsm tion-iforf dividing theproductbycansingit w r which h-as l1St;; ben described ;is i only an 63-1 ample of realizatiolrfor Mae-a ents Slibfj h 'li' qnidf r'naterials and even} pn veri z d frn erials 'stleh: =a's sand -forl v a esti a esser na eeith di n ne p p ll 19 can The devisedfjfor 'reccivingfaj pa'ratus illustrated" m nger-103M 1 1,1." This d ifinsing apparatus has .a *fifistum-shaped' e si T-s 'cti' ajee 1 i '7 rank. L It is thus 'an "a, perforated bot'tomi "45-point; f tilting ai'fgrate; This perforated bottoin'fali l be-replaced bya vvireganze the sizesofthe' mes es or which are "snitably ch osen. The

umaterials enterthe chamberAO and penetrate into the spaces-comprised hetvveenfthe r'adial;

44 apparatus; they are projectedbri'tliegron-iiddirectly through the openings ofthe lbdttdm" 4551 "mighf be moreover pq'ssibl '1n pa'rtic'ularqrer sprea'dinggtairelfto dispehse with the perforated bottom45j aiidto provided on the "walls? 44', transverse vanes or blades 44 as "shown f in Figs. 1%.; and 15, facilitating the regular dis persion bfthe' gravel.-"" he diffn ing apparatnsillustrated in-Figsi 12' and 13 is" more "particularly' devised for spreading materials which are not' very fluid and of viscous consistency. It comprises a conical bowl 47 having arectilinear or curvi linear generating line, provided with co-axial conical'pai'titions'48'providing between-them anmilar spaces49 the-bottom of wh'ich 'is per; forated with openings 50 for-the projection of thelr'n'aterial on the ground. As in the. diffusing apparatus shown in Fig. 6, awall 40 direots 'the flow "of the material 'vtowardsh the central portion of the bowl 47, .7

As indicatedin the foregoing, any type" of lao diffusing apparatus can be secured on the driving axis 5, for instance b means of a central socket 27 secured by a key 28 or any other suitable securing means.

The various types of diffusing apparatus which have just been described are only simple examples of realization to which modifications can be made or to which elements can be added, according to the materials to be treated, without departing from the scope of the invention;

The object sought for by the arrangements described is to put centrifugal force in action for dispersing the material and dividing it by partitions and apertures, this material being fed to the diffusing apparatus by gravity or under pressure, by any suitable means.

\Vhat I claim as my invention and desire to secure by Letters Patent is:

1. In a centrifugal diffusing apparatus for spreading products on roadways, a fixed frustum-shaped casing, means for feeding said casing at its part of smallest diameter with the product to be spread, said casing being open at its part of largest diameter, a rotatin member fitted in the said casing, a shaft co-axial with the casing and keyed on the said rotating member, and means to rotate the said shaft.

2. In a centrifugal diffusing apparatus for spreading products on roadways, a fixed frus' tum-shaped casing fed, at its diameter with the product to open at its part of largest diameter, a rotating member having walls spaced apart some of which are perforated, a shaft co-axial with the said casing and keyed on the said rotating member, and means to rotate the said shaft.

3. In a centrifugal diffusing apparatus according to claim 1, said feeding means comprising a pipe connected with said casing and arranged to cause the product to be spread, to fall down at the central part of said rotating member.

4. An apparatus as defined in claim 1, said feeding means embodying a tank for the product to be spread and a pipe therefrom to said casing, a wheeled chassis carrying said difiusing apparatus and tank; said driving means comprising a sprocket wheel on said shaft, a second sprocket wheel, a chain connecting said sprocket wheels, a pulley connected to the second sprocket wheel and arranged in the plane of a carrying wheel of the chassis, and means to permit the driver of the machine to put said pulley into and out of contact with said carrying wheel.

In testimony whereof I have signed my name to this specification.

ALPHONSE JOSEPH SCHARS.

pirt of smaller spread, and 

